Portable air cooler



FIG. 1 is a top perspective view showing our design thereof;

FIG. 2 is a bottom perspective view;

FIG. 3 is a front view;

FIG. 4 is a rear view;

FIG. 5 is a left side view;

FIG. 6 is a right side view;

FIG. 7 is a top view; and,

FIG. 8 is a bottom plan view thereof.

The broken lines shown in the figures are for the purpose of illustrating portions of the portable air cooler and form no part of the claimed design. 

CLAIM The ornamental design for a portable air cooler, as shown and described. 